What is BMS commissioning?
BMS commissioning is the structured process of configuring, testing, validating and optimising a Building Management System (BMS) to ensure it controls a building safely, efficiently and in line with the original design intent.
It is the stage where the BMS moves from “installed” to “operational” and is critical to building performance, energy efficiency and occupant comfort.
Why BMS commissioning matters
- Ensures HVAC and plant operate as designed
- Reduces energy waste and unnecessary run-hours
- Prevents comfort complaints and instability
- Identifies faults before handover
- Provides confidence for clients and operators
When commissioning takes place
BMS commissioning typically occurs after controls installation but before final building handover. It may also be revisited during seasonal commissioning or post-occupancy optimisation.
- New build projects
- Refurbishments and system upgrades
- Plant replacements or extensions
- Energy optimisation initiatives
Typical BMS commissioning stages
- Review of design documents and control strategies
- Point-to-point testing of devices and sensors
- Configuration of control logic and sequences
- Testing of alarms, interlocks and safeties
- Functional testing of HVAC and plant
- Optimisation and fine-tuning
- Client demonstration and handover
What is commissioned during BMS commissioning?
- Air handling units (AHUs)
- Boilers, chillers and heat pumps
- Pumps, valves and dampers
- Fan coil units and terminal units
- Energy meters and sensors
- Alarms, schedules and graphics
BMS installation vs commissioning
Installation focuses on hardware and wiring. Commissioning focuses on behaviour, logic and performance. A correctly installed system can still perform badly if it is poorly commissioned.
Tools used in BMS commissioning
- BMS software platforms (Trend, Tridium, Siemens, Schneider)
- Control strategy documentation
- Electrical and mechanical schematics
- Test scripts and commissioning sheets
- Trend logs and live data analysis
Common commissioning issues
- Incorrect control strategies
- Mislabelled or miswired points
- Poor sensor placement or calibration
- Conflicting schedules
- Unstable or oscillating control loops
Who carries out BMS commissioning?
BMS commissioning is typically carried out by specialist BMS Commissioning Engineers with strong